Simultaneous determination of opiates, methadone, amphetamines, cocaine, and metabolites in human placenta and umbilical cord by LC-MS/MS A de Castro, A Díaz, B Piñeiro, E Lendoiro, A Cruz, M López-Rivadulla, ... Analytical and bioanalytical chemistry 405, 4295-4305, 2013 | 32 | 2013 |